javascript - how can I add a post identifier to my ajax -

i want add post identifier ajax. right way identify post checking if 1 of inputs present. here code:

   <input name="id" id="id" type="text">

if input name id present posted execute php code. here code:

   if(isset($_post['id'])){

the issue having want put multiple id posts in same page need sort them know post doing. want add post identifier.

   if(isset($_post['addlogin'])){

how can add post identifier ajax function. here code:

   $(function() {    $("button#loginsubmit").click(function(){    $.ajax({    type: "post",    url: "",    data: $('form.loginform').serialize(),

i wanted add {last_time:last_time} how can add post identifier?

like this:

data: { last_time : "test"}

HR